Sonnabend

Mr. Cohen bought the work for an undisclosed sum from the estate of major New York dealer Illeana Sonnabend, who died in 2007.

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Castelli helped organize exhibitions of his artists' work with dealers in the United States and Europe, including Irving Blum in Los Angeles and Ileana Sonnabend in Paris.

Stephanie Adamowicz: The Legacies of Duveen, Castelli, and Gagosian Stephanie Adamowicz 2011

For example, in the post-war period, Castelli was much indebted to his first wife Ileana Sonnabend, whose first gallery in Paris contributed widely to the success of Castelli's artists, who she frequently exhibited at the gallery.

Stephanie Adamowicz: The Legacies of Duveen, Castelli, and Gagosian Stephanie Adamowicz 2011

Acquiring the Castelli Gallery records was a somewhat complicated affair, requiring the approval of the dealer's third and surviving wife, Barbara Bertozzi Castelli, Jean-Christophe Castelli (his son with second wife Antoinette Castelli) and Nina Castelli Sundell (his daughter with first wife Ileana Sonnabend), which was concluded in 2007.

Daniel Grant: Choice Nuggets Found in Leo Castelli Archives Daniel Grant 2011

"This is about good corporate governance," says Stephanie Sonnabend , CEO of Sonesta International Hotels Corp., who co-founded the initiative.

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For example, in the post-war period, Castelli was much indebted to his first wife Ileana Sonnabend, whose first gallery in Paris contributed widely to the success of Castelli's artists, who she frequently exhibited at the gallery.

Stephanie Adamowicz: The Legacies of Duveen, Castelli, and Gagosian Stephanie Adamowicz 2011

Castelli helped organize exhibitions of his artists' work with dealers in the United States and Europe, including Irving Blum in Los Angeles and Ileana Sonnabend in Paris.

Stephanie Adamowicz: The Legacies of Duveen, Castelli, and Gagosian Stephanie Adamowicz 2011

'Untitled' (1974) Among the first photographers to be embraced in the late '70s and early '80s by New York galleries (Sonnabend and Robert Miller) previously more disposed toward painters and sculptors, she also became in 1987 one of a handful of women to ever receive a solo show of her photographs at the Museum of Modern Art.

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Castelli helped organize exhibitions of his artists' work with dealers in the United States and Europe, including Irving Blum in Los Angeles and Ileana Sonnabend in Paris.

Stephanie Adamowicz: The Legacies of Duveen, Castelli, and Gagosian Stephanie Adamowicz 2011

Acquiring the Castelli Gallery records was a somewhat complicated affair, requiring the approval of the dealer's third and surviving wife, Barbara Bertozzi Castelli, Jean-Christophe Castelli (his son with second wife Antoinette Castelli) and Nina Castelli Sundell (his daughter with first wife Ileana Sonnabend), which was concluded in 2007.

Daniel Grant: Choice Nuggets Found in Leo Castelli Archives Daniel Grant 2011